C++ osmium::Way类代码示例

    inline void parseWay(const osmium::Way& way)
    {
        const auto& tags = way.tags();
        auto it = std::find_if(tags.begin(), tags.end(), highway_filter);
        if (it == tags.end())
        {
            return;
        }

        const osmium::NodeRef& first = way.nodes().front();
        const osmium::NodeRef& last = way.nodes().back();

        // filter out closed ways, generally this will just cause false
        // positives with round-a-abouts
        if (first == last)
        {
            return;
        }

        const char* name = tags.get_value_by_key("name", "");
        const char* ref = tags.get_value_by_key("ref", "");

        unsigned name_id = getStringID(name);
        unsigned ref_id = getStringID(ref);

        // we can't use osmium ids because MultiMap expects unsigned keys
        unsigned long firstID = static_cast<unsigned long>(first.ref());
        unsigned long lastID = static_cast<unsigned long>(last.ref());

        const unsigned wayIdx = parsed_ways->size();
        endpoint_way_map->unsorted_set(firstID, wayIdx);
        endpoint_way_map->unsorted_set(lastID,  wayIdx);

        parsed_ways->emplace_back(way.id(), firstID, lastID, name_id, ref_id);
    }

    void create_single_way(const osmium::Way &way) {
        osmium::geom::OGRFactory<> ogr_factory;
        OGRLineString *linestring = nullptr;
        try {
            linestring = ogr_factory.create_linestring(way,
                         osmium::geom::use_nodes::unique,
                         osmium::geom::direction::forward).release();
        } catch (osmium::geometry_error) {
            insert_way_error(way);
            return;
        } catch (...) {
            cerr << "Error at way: " << way.id() << endl;
            cerr << "  Unexpected error" << endl;
            return;
        }

        try {
            ds.insert_way_feature(linestring, way, 0);
        } catch (osmium::geometry_error&) {
            cerr << "Inserting to table failed for way: "
                 << way.id() << endl;
        } catch (...) {
            cerr << "Inserting to table failed for way: "
                 << way.id() << endl;
            cerr << "  Unexpected error" << endl;
        }
        delete linestring;
    }

                void way(const osmium::Way& way) {
                    *m_out += 'w';
                    write_meta(way);

                    *m_out += " N";

                    if (!way.nodes().empty()) {
                        auto it = way.nodes().begin();
                        if (m_options.locations_on_ways) {
                            write_field_ref(*it);
                            for (++it; it != way.nodes().end(); ++it) {
                                *m_out += ',';
                                write_field_ref(*it);
                            }
                        } else {
                            write_field_int('n', it->ref());
                            for (++it; it != way.nodes().end(); ++it) {
                                *m_out += ',';
                                write_field_int('n', it->ref());
                            }
                        }
                    }

                    *m_out += '\n';
                }

 /**
  * Extract segments from given way and add them to the list.
  *
  * Segments connecting two nodes with the same location (ie
  * same node or different nodes with same location) are
  * removed after reporting the duplicate node.
  */
 uint32_t extract_segments_from_way(osmium::area::ProblemReporter* problem_reporter, const osmium::Way& way) {
     if (way.nodes().empty()) {
         return 0;
     }
     m_segments.reserve(way.nodes().size() - 1);
     return extract_segments_from_way_impl(problem_reporter, way, role_type::outer);
 }

                uint32_t extract_segments_from_way_impl(osmium::area::ProblemReporter* problem_reporter, uint64_t& duplicate_nodes, const osmium::Way& way, role_type role) {
                    uint32_t invalid_locations = 0;

                    osmium::NodeRef previous_nr;
                    for (const osmium::NodeRef& nr : way.nodes()) {
                        if (!nr.location().valid()) {
                            ++invalid_locations;
                            if (problem_reporter) {
                                problem_reporter->report_invalid_location(way.id(), nr.ref());
                            }
                            continue;
                        }
                        if (previous_nr.location()) {
                            if (previous_nr.location() != nr.location()) {
                                m_segments.emplace_back(previous_nr, nr, role, &way);
                            } else {
                                ++duplicate_nodes;
                                if (problem_reporter) {
                                    problem_reporter->report_duplicate_node(previous_nr.ref(), nr.ref(), nr.location());
                                }
                            }
                        }
                        previous_nr = nr;
                    }

                    return invalid_locations;
                }

 /***
  * Insert error node into nodes table: way contains of one
  * coordinate.
  */
 void insert_way_error(const osmium::Way &way) {
     ErrorSum *sum = new ErrorSum();
     sum->set_way_error();
     ds.insert_node_feature(way.nodes().begin()->location(),
                            way.nodes().begin()->ref(), sum);
     delete sum;
 }

 polygon_type create_polygon(const osmium::Way& way, use_nodes un=use_nodes::unique, direction dir = direction::forward) {
     try {
         return create_polygon(way.nodes(), un, dir);
     } catch (osmium::geometry_error& e) {
         e.set_id("way", way.id());
         throw;
     }
 }

 void way(const osmium::Way& way) {
     try {
         gdalcpp::Feature feature{m_layer_linestring, m_factory.create_linestring(way)};
         feature.set_field("id", int32_t(way.id()));
         add_feature(feature, way);
     } catch (const osmium::geometry_error&) {
         std::cerr << "Ignoring illegal geometry for way " << way.id() << ".\n";
     }
 }

        void way(const osmium::Way& way) {
            if (m_max_relation_id > 0) {
                throw std::runtime_error("Found a way after a relation.");
            }

            if (m_max_way_id >= way.id()) {
                throw std::runtime_error("Way IDs out of order.");
            }
            m_max_way_id = way.id();
        }

 // - walk over all way-versions
 //   - walk over all bboxes
 //     - if the way-id is recorded in the bboxes way-trackers
 //       - send the way to the bboxes writer
 void way(const osmium::Way& way) {
     if (debug) {
         std::cerr << "cut_administrative way " << way.id() << " v" << way.version() << "\n";
     }
     for (const auto& extract : info->extracts) {
         if (extract->way_tracker.get(way.id())){
             extract->write(way);
         }
     }
 }

 void eway(extract_data& e, const osmium::Way& way) {
     for (const auto& nr : way.nodes()) {
         if (e.node_ids.get(nr.positive_ref())) {
             e.way_ids.set(way.positive_id());
             for (const auto& nr : way.nodes()) {
                 e.extra_node_ids.set(nr.ref());
             }
             return;
         }
     }
 }

    // The way handler is called for each node in the input data.
    void way(const osmium::Way& way) {
        {
            osmium::builder::WayBuilder builder{m_buffer};
            copy_attributes(builder, way);
            copy_tags(builder, way.tags());

            // Copy the node list over to the new way.
            builder.add_item(way.nodes());
        }
        m_buffer.commit();
    }

 void way(const osmium::Way& way) {
     ++ways;
     if (!matches_user_filter(way)) return;
     ++uways;
     for (const auto& node : way.nodes()) {
         m_nodefile <<
             way.id() << "\t" <<
             way.version() << "\t" <<
             node.ref() << std::endl;
     }
 }

 /**
  * This is called when a way is not in any multipolygon
  * relation.
  *
  * Overwritten from the base class.
  */
 void way_not_in_any_relation(const osmium::Way& way) {
     if (way.nodes().size() > 3 && way.ends_have_same_location()) {
         // way is closed and has enough nodes, build simple multipolygon
         try {
             TAssembler assembler(m_assembler_config);
             assembler(way, m_output_buffer);
             possibly_flush_output_buffer();
         } catch (osmium::invalid_location&) {
             // XXX ignore
         }
     }
 }

void parse_osmium_t::way(osmium::Way& way)
{
    if (way.deleted()) {
        m_data->way_delete(way.id());
    } else {
        if (m_append) {
            m_data->way_modify(way);
        } else {
            m_data->way_add(way);
        }
    }
    m_stats.add_way(way.id());
}